The company has not yet calculated all the gains and losses on its platform. But it said one individual placed a number of wagers on Trump, leading to a £2 million ($2.5 million) payout.

Ladbrokes estimated that traditional bookmakers — which excludes Betfair’s exchange — would have to pay out about £15 million ($18.6 million) on Trump bets. The bookmakers took in about £30 million on the U.S. election.

The gambling firms showed Clinton’s odds of winning were roughly 80% on Tuesday.

Similar odds were offered ahead of the Brexit referendum in June, with bookmakers expecting the majority of U.K. voters would want to remain in the European Union. But the final tally showed 52% of voters opted to leave the EU.